Phosphorous Enrichment in Molten Adjusted Converter Slag:Part II Enrichment Behavior of Phosphorus in CaO-SiO_2-FeO_x-P_2O_5Molten Slag  

作　　者：WANG Nan LIANG Zhi-gang CHEN Min ZOU Zong-shu 

机构地区：[1]School of Materials and Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China

出　　处：《Journal of Iron and Steel Research International》2011年第12期22-26,共5页

基　　金：Item Sponsored by National Natural Science Foundation of China/Joint Fund for Iron and Steel Research(50874130);National Natural Science Foundation of China(50974034)

摘　　要：The enrichment behavior of phosphorus in CaO-SiO2-FeOx-P2O5 slag was studied by making an investigation on the distribution of phosphorous content in the CaO-SiO2-FeOx-P2O5 molten slag.The research results showed that the 2CaO·SiO2 solid particles existing in molten slag were the condensation sites for the phosphorus enrichment.The enrichment process of phosphorus in the molten slag can be recognized as three substeps：mass transfer of phosphorus from bulk slag to the surface of 2CaO·SiO2 particle,superficial solid solution reaction of phosphorus around the 2CaO·SiO2 particle,and diffusion of phosphorus through the product layer of 2CaO·SiO2-3CaO·P2O5 solid solution to the inner of 2CaO·SiO2 particle.Moreover,higher temperature is favorable to the phosphorous enrichment from molten bulk slag to the 2CaO·SiO2 particles.The enrichment behavior of phosphorus in CaO-SiO2-FeOx-P2O5 slag was studied by making an investigation on the distribution of phosphorous content in the CaO-SiO2-FeOx-P2O5 molten slag.The research results showed that the 2CaO·SiO2 solid particles existing in molten slag were the condensation sites for the phosphorus enrichment.The enrichment process of phosphorus in the molten slag can be recognized as three substeps：mass transfer of phosphorus from bulk slag to the surface of 2CaO·SiO2 particle,superficial solid solution reaction of phosphorus around the 2CaO·SiO2 particle,and diffusion of phosphorus through the product layer of 2CaO·SiO2-3CaO·P2O5 solid solution to the inner of 2CaO·SiO2 particle.Moreover,higher temperature is favorable to the phosphorous enrichment from molten bulk slag to the 2CaO·SiO2 particles.

关 键 词：enrichment behavior PHOSPHORUS 2CaO·SiO2 particle mass transfer 

分 类 号：TQ172.44[化学工程—水泥工业] X52[化学工程—硅酸盐工业]